Native to Alberta, wolf willow is a common site in natural areas such as streambanks, dry slopes, and open fields. It is aggressive and often invasive, and I would not recommend planting this shrub in an ornamental setting. It looks best in its native environment, on acreages, and in large, park-like settings. It is an interesting contrast plant, with silvery foliage, yellow flowers, and a strong fragrance.
I rarely see this plant in the ornamental landscape. It is used in reclamation and slope stabilization projects.
Anytime of year.
Not normally necessary if used in a mass planting. This plant spreads by suckering, so if used in an ornamental garden (not recommended) it would be necessary to control the suckers.
(c) 2016 Shane LePage, Wild Rose Garden & Tree Service Inc., Red Deer, AB